DLSS 3 available in VR yet and graphics card advice?

I hope this topic continues. I’m actually considering buying a prebuilt today (Memorial Day) from maybe IBuyPower. I really want the 4090 but the difference in price is a wow. I’m brand new to VR (Quest 2) and want the best performance BUT I’m not rich so don’t want to get the 4090 if I can be happy with a cheaper GPU.